Fireproof window.



No. 664,356. Patented Dec. l8, I900."

W. J. LARKIN.

FIREPROOF WINDOW (Application filed Mar. 23, 1900.

NITED STATES PATENT OFFICE.

WILLIAM J. LARKIN, OF CHICAGO, ILLINOIS.

FIREPROOF WINDOW.

SPECIFICATION forming part of Letters Patent No. 664,356, dated December18, 1900.

Application filed March 23, 1900. Serial No. 9,838. No model.)

To all whom it Tlbby concern:

Be it known that I, WILLIAM J. LARKIN, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois,havcinvented certain new and useful Improvements in Fireproof Windows, ofwhich the following is a full, clear, and exact speciflcation.

My invention relates to that class of fireproof windows which areusually constructed of sheet metal, and the improvements have moreespecial reference to the guide-strips or stops and the method ofholding the same in place employed for guiding and holding the sash.

The primary object of my invention is to provide an improved removablesheet-metal guide-strip or stop which may be readily taken out forremoving the sash.

With these ends in View my invention consists in certain features ofnovelty in the construction, combination, and arrangement of parts bywhich the said object and certain other objects hereinafter appearingare attained, all as fully described with reference to the accompanyingdrawings and more particularly pointed out in the claims.

In the said drawings, Figure l is an enlarged plan sectional view of oneside of a window frame and sash provided with guidestrips or stopsconstructed according to my invention; and Fig. 2 is a front elevationthereof, partly broken away, 011 a small scale.

1 represents the sash, which may be constructed in any suitable way, butpreferably of metal or fireproof material and preferably having itsedges formed with flanges 2, which engage over or fit around theguide-strips or stops 3, and 4. represents the vertical member of thewindow-frame, also composed of sheet metal and bent or formed to thedesired design., The inner side of each of the side members at of thewindow-frame is bent to form vertical channels 5, which are for thereception of the guide-strips or stops 3, each of which iscomposed,preferably,of a single strip of metal bent into the form of achannel-iron and having its free edges inserted into the channel 5.These free edges of the stop or strip 3 ordinarily possess sufflcientelasticity to retain the stop in place in its channel but if the uses towhich the window is put require a more stable fastening the free edgesof the stop in addition to being slightly flared outwardly. may beturnedabruptly to form engaging hooks 6, and the opposite walls of thechannel 5 may be bent inwardly here and there to form lugs 7 for theengagement of the hooks 6 when the stop is forced into place, theconstruction being such, however, that the stops may be withdrawn bycompressing their sides together or exerting abnormal force in anoutward direction. These stops, it will be seen, instead of fittingbetween the sashes fit into grooves or channels formed in the edgesthereof by the flanges 2. It is quite evident, therefore, that in orderto insert the sash after the window-frame has been constructed it isnecessary to construct each of the stops oftwo pieces or, in otherwords, divide the stop at its mid length or height, so that the sash maybe placed in at the top of the frame after the lower halves of the stopsor guide-strips have been inserted in the lower part of the frame, thesash then pulled down over the lower halves of the stops or guidestrips,and the upper halves of the latter subsequently inserted above the sash.The abutting ends of the upper and lower halves of the stops orguide-strips are beveled ofi on opposite angles, as shown at 8 in Fig.2, in order to facilitate the insertion and removal of such halves, aswill be understood. It is not necessary for the purposes of my inventionin its broadest sense, however, to let the stops or guide-strips intothe edges of the sash; but with the construction described it will beseen that a tight joint is produced which will be effective in excludingdust and wind as well as fire.

Having thus described my invention, what Letters Patent, is- I 1. Thecombination with a window-frame having a channel formed therein and aguidenel, said channel and guide-strip or stop being provided with aninterlocking lug or hook, substantially as set forth.

having a channelformed therein and a guidestrip or stop formed of achannel-iron having its free edges outwardly flared or expansible andfitted in said channel in the frame, substantially as set forth.

WM. J. LARKIN.

Witnesses:

EDNA B. JOHNSON,

F. A. HOPKINS.

I claim as new therein, and desire to secure by strip or stop removablyseated in said chan- 2. The combination with a window-frame

